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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6179-6179 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new three dimensional model is set up for interpreting the magnetostrictive "jumps'' in Terfenol-D compressed along the [112¯] or magnetically heat treated perpendicular to the [112¯]. This model considers the combined effects of magnetic anisotropy, stress, and magnetic field. It assumes no domain interaction and separates the magnetizing process of such Terfenol into three steps: (a) 180° domain wall movements at low applied H; (b) three dimensional domain rotations at high H; (c) non-180° domain wall movements at higher H. The magnetostrictions along the three orthogonal directions of [111], [112¯], and [11¯0] in Terfenol Tb0.3Dy0.7Fe1.9 compressed along the [112¯] are calculated. The ratios of these to the saturated [111] magnetostriction of single crystalline Terfenol are 0, 0, 0 at the end of (a); −4/3, 5/6, 1/2 at the end of (b); −4/3, 4/3, 0 at the near end of (c), respectively. These data are consistent with our measurements and others.1
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 2587-2589 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The microstructure, Curie temperature and magnetostriction of R(Fe1−xAlx)1.8 alloys (R=Dy0.65Tb0.25Pr0.1, x≤0.3) have been investigated using optical microscopy, x-ray diffraction, transmission electron microscopy, electron probe microanalysis, positron annihilation technique, vibrating sample magnetometer, and standard strain gauge technique. It was found that the alloys are essentially single phase up to x=0.30. The defects in R(Fe1−xAlx)1.8 decrease with increasing Al content when x≤0.1. The magnetostriction of the alloys decreases with increasing Al content in high applied magnetic fields, but it exhibits a peak when x=0.05 in low applied magnetic fields (H≤160 k A/m). © 1996 American Institute of Physics.
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  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 107 (1997), S. 4537-4545 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report time-resolved Fourier transform spectroscopic measurements on the kinetics of the reaction of vibrationally excited N2O with hydrogen atoms. Vibrationally excited N2O is formed by T–V energy transfer in collisions with hydrogen atoms having 2.3 eV of translational energy. Although the T–V process is capable of exciting the N2O to vibrational levels up to 18 500 cm−1, collisions in which the relative translational energy is greater than 11 000 cm−1 result in rapid reaction to form either NH(X 3Σ)+NO(X 2Π) or OH(A 2Σ+)+N2(X 1Σ+). N2O which is vibrationally excited to energies between 6000 and 11 000 cm−1, reacts with thermal hydrogen atoms, with a rate constant which is about 1.7×10−10 cm−3 molecule−1 s−1. N2O vibrationally excited to levels below 6000 cm−1 [the height of the barrier to reaction forming OH(X 2Π)+N2 on the ground-state surface] is lost very slowly, presumably by deactivation, with a rate constant which is about four orders of magnitude slower than the reaction. The results indicate that increasing the vibrational energy of the N2O by 11 000 cm−1 increases the cross section for the reaction with hydrogen atoms by about seven orders of magnitude. © 1997 American Institute of Physics.
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  • 4
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new electron cyclotron resonance (ECR) ion source (LECR3—Lanzhou Electron Cyclotron Resonance Ion Source No. 3) has been constructed this year. The main purpose of this source is to provide highly charged ion beams for atomic physics and surface physics research. The design of this ion source is based on the IMP 14.5 GHz ECR ion source (LECR2—Lanzhou Electron Cyclotron Resonance Ion Source No. 2) with double rf heating by inserting waveguide directly and aluminum chamber. Furthermore, the volume of the plasma chamber is larger than that of LECR2 so as to increase the rf power and improve beam intensity for highly charged ions. But the hexapole field on the chamber wall is kept the same value in order to compare with the performance of LECR2. After only four days conditioning the first test results were obtained. The final result of this ion source is expected to be better than LECR2's. © 2002 American Institute of Physics.
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 68 (2003), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : The formation of starch (potato, corn, and rice) and ham salt-soluble protein (SSP) composite during heating was studied using thermal and rheological analysis. Measurements from differential scanning calorimetry showed that the peak temperature of starch/SSP composite was slightly lower than that of the corresponding starch. SSP exhibited an initial G' higher than zero and became a rigid structure as indicated by the decrease in tan δ after heating. The data of tan 8 δ illustrated that starch and protein transition proceeded independently. Scanning electron microscopy and light microscopy with the aid of histologic technique revealed the network and distribution of starch and protein in starch/SSP composite.
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  • 6
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: An antibacterial compound Ar26, with a molecular weight of 761, was isolated from a culture of a nonpathogenic strain of Agrobacterium vitis (originally called A. radiobacter) E26. Ar26 was purified by adsorption on activated charcoal, extraction with 70% ethanol and ion-exchange chromatography successively on DEAE-Sepharose, SP-Sepharose and Mono S. Ar26 strongly inhibited the growth of the crown gall bacteria A. vitis MI3-2 and A. tumefaciens CY4 on culture plates, the activities of human immunodeficiency virus-1 reverse transcriptase and the glycohydrolases α-glucosidase and β-glucosidase.
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e570-e571 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The fungal metabolite terrein (alternative name: trans-2,3-dihydroxy-4-propenylcyclopent-4-enone), C8H10O3, forms monoclinic (P21) crystals. The molecules form hydrogen-bonded chains, with O...O distances of 2.7115 (16) and 2.8155 (15) Å.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Stochastic environmental research and risk assessment 12 (1998), S. 53-64 
    ISSN: 1436-3259
    Keywords: Key words: Risk ; clustering ; point process ; Poisson ; flood.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract: Since the introduction into flood risk analysis, the partial duration series method has gained increasing acceptance as an appealing alternative to the annual maximum series method. However, when the base flow is low, there is clustering in the flood peak or flow volume point process. In this case, the general stochastic point process model is not suitable to risk analysis. Therefore, two types of models for flood risk analysis are derived on the basis of clustering stochastic point process theory in this paper. The most remarkable characteristic of these models is that the flood risk is considered directly within the time domain. The acceptability of different models are also discussed with the combination of the flood peak counted process in twenty years at Yichang station on the Yangtze river. The result shows that the two kinds of models are suitable ones for flood risk analysis, which are more flexible compared with the traditional flood risk models derived on the basis of annual maximum series method or the general stochastic point process theory.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Experiments in fluids 5 (1987), S. 422-424 
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of industrial microbiology and biotechnology 20 (1998), S. 259-264 
    ISSN: 1476-5535
    Keywords: Keywords: taxol; attenuation; benzoic acid; Periconia sp; endophyte
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A Periconia sp was isolated from Torreya grandifolia (a relative of yew that does not synthesize taxol) near Huangshan National Park in the People’s Republic of China. This fungus, not previously known as a tree endophyte, was isolated from the inner bark of a small lower limb. When freshly isolated from the tree and placed in a semi-synthetic medium, the fungus produced readily detectable quantities of the anticancer drug taxol. Other taxol-producing endophytes were also isolated from this source. The production of taxol by Periconia sp was demonstrated unequivocally via spectroscopic and immunological methods. However, successive transfers of the fungus in semi-synthetic medium resulted in gradual attenuation until low production occurred even though fungal growth was relatively unaffected. Several compounds, known previously as activators of microbial metabolism, including serinol, p-hydroxybenzoic acid, and a mixture of phenolic acids, were capable of fully or partially restoring taxol production to otherwise taxol-attenuated cultures. The compound with the most impressive ability to activate taxol production was benzoic acid at 0.01 mM. Benzoic acid was not a taxol precursor.
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